Lightninghobby.com makes every effort to ship all products in a single shipment. If, for any reason, we cannot ship one or more items due to backorder, we will ship the parts that are available and credit your account accordingly. If a small item (most parts) from a large order (complete car, truck, or boat kits) cannot be shipped, credit may only be for the part without an adjustment in shipping. This is because shipping charges is based on the dimensions of the box. We will contact you if the part is backordered to verify if you are willing to wait for the backordered part to ship.